Depends, doesn't it? I mean it's an investment in more equipment and it seems to me like AG takes a lot more time. So if your time is of no value...
Why more equipment? BIAB is dirt cheap. Also can go real quick -- you only really need to mash for 40 minutes, only need to boil for probably about the same 30-45 minutes, also you don't always need to brew 5 gallons -- what if you only brew 2 gallons? That saves time as well. There are certainly things that can be done to make the day go quicker. My time is valuable, so that's why I do all these things. I also want to drink the best beer possible and have the most control over the end product, and not leave it up to an extract manufacturer and a homebrew shop to control the quality and freshness of the extract. It's pretty quick and easy to make your own "extract", especially with BIAB and small batch brewing. Small batch size optional of course.